Somes Facebook Fails… Solution?

Hi there… I don’t know if this is caused by the plugin or not, but every once in a while (a couple times a week) one of my posts will not be recognized by facebook.

For example, compare these two:

https://www.triplepundit.com/2013/08/climate-justice/ and
https://www.triplepundit.com/2013/07/waste-management-proactive-environmental-justice/

These two articles are structurally identical but if you try to share the first one on facebook it acts as if the page is a 404. This seems to be a permanent problem for the url, cached somehow on facebook’s end. Once this happens, there’s no hope for sharing that page.

Anyone have a clue what might cause this?

https://www.ads-software.com/plugins/twitter-facebook-google-plusone-share/